Lubrication-pipe.



J. -MHLRAD. LUBRIcATIoN PIPE.

APPLICATION FILED MAY 24, 1905.

PATENTBD PEB. 13, 1906.

251/766 ttor M717@ Jlzb'kra/ UNITED STATES PATENT OFFICE.

JHANN MHLRAD, OF JASLO, AUSTRIA-HUNGARY.

LUBRICATION-PIPE.

Specification of Letters Patent.

Patented Feb. 13, 1906.

Application filed May 24, 1905. Serial No. 262,102.

xo ings thereof, and has for its primary object the revision of means whereby the supply of oil om a suitable receptacle to the shaft or bearing may be automatically regulated according to the speed of the shaft and turned on and shut off upon the starting and stopping of the shaft.

To this end my invention comprises, broadly, a vacuum-feed which is operated through the medium of a closed chamber in 2o communication with the shaft and into which one end of a tube projects, the opposite end being contracted and communicating with a suitable oil-supply.

My invention will be fully illustrated in z 5 connection with the accompanying drawings and will be particularly pointed out in the' appended claims.

In the drawings, Figure 1 illustrates the preferred embodiment of my invention. Fig.

3o 2 shows a modified form of the device shown in Fig. 1. Fig. 3 is a further modified form; and Fig. 4 is a detail view of the tube, illustrating a structural modification of the same.

Like characters of reference designate simi- 3 5 lar parts throughout the different figures of the drawings.

In the preferred form a fragmentary view of a bearing A and its shaft B is shown. The bearing is provided with an oil cup or recep- 4o tacle a, having a removable lid or cover, and a downwardly-opening bore a', communicating with the interior of the bearing-box. The shaft B is provided with a journal-brass l), having a bore d extending therethrough and adapted to register with the bore a. In order to insure an effective and a relatively tight joint between the parts, the brass b is provided with a rejecting nipple adapted to lit into a comp emental recess formed in the 5o lower wall of the box A. It will be apparent provide a tube s, which is fixed in the bore a. in any suitable manner to close the upper end thereof to the oil-cup. A convenient means for securing the tube in place consists in passing the same through a piece of cork or packing c, having an outer diameter adapted to fit snugly within the bore a', a's shown in Fig. 1. If it is desired, the pipe may be provided with an annular projecting flange e, as shown in Fig. 4, to insure an exact re ation of the tube with the packing when the parts are fitted in place.v The tube s is slightly smaller in diameter than the bore a and projects downwardly therein some distance, while the opposite end is bent upon itself so that its outer end is closely adjacent to the lowest portion of the oil-cup. The purpose of this construction is to maintain communication between the end of the tube s and the oil when the latter has reached a.low stage. The outer end of said tube is contracted, as shown at s', forming an inlet which under ordinary cond itions should be approximately 0.1 to 0.4 millimeter in diameter.

The operation of the device is as follows: Rotation of the shaft B creates a vacuum in thc vacuum-chamber formed by the bores a and d, which results in drawing the oil into the tube through its contracted opening s and delivering it upon the shaft B. As the speed of the shaft B increases or decreases the vacuum formed will vary and will result in the delivery of an amount of oil ro ortionate to the speed of the shaft. urt er, when the operation ceases the vacuum will be disrupted and the delivery of oil will cease.

It will be obvious that while the supply of lubricant will not be delivered immediately upon starting the shaft the latter will, from its previous operation, have been thoroughly lubricated, and the time ela sing between the starting of the shaft and t e delivery of the supply of oil thereto will be comparatively slight. In cases where the connection between the journal-brass and the bo`x A is such as to form an air-tight passage between the box and the shaft a relatively complete and active vacuum will result and the restricted openin s will prevent too great a supply of oil to t 1e shaft B. On the other hand and under ordinary conditions, where the vacuumchamber is not air-tight the vacuum will never be sufliciently effective lto supply oil in excessive quantities. It will thus be seen` that under the former conditions the opening IOO s would necessarily be contracted a great deal, Whereas under the latter conditions the contraction of said opening mi ht be 1ess One of the modiiied forms o Ithe device of my invention is shown in Fig. 2, wherein the tube s is inclosed in a secondV tube the latter being secured to the plug c. In t 's form the tube f is provided with apertures g for admitting the oil to the tube f.

Where the device of my inventionis applied to bearings of cross-heads and the like which are motion, itisl merely necessary to project the tube s into the oil-cup, inasmuch asthe lubricant is thrown about the-cup and caused tolight upon portions of the tubes, Whereupon it Will be drawn in throu h the contracted inlet and deliveredv to t e, bearingparts. This form of the device is shown 1n Vhat I claim as my invention, and desire to secure by Letters Patent, is-

1. A device of the class described comprising an oil-receptacle, a shaft, and vacuumcontrclled means communicating'with the recetacle and delivering tothe shaftwhereby a ow of the lubricant is eected in proportion to the speed of the shaft.

2. A device of the class described CQmprising an oil-receptacle, 4svafisha'fg@ andgradtube communicating Wlth the receptacle and delivering to the shaftsaidu tube, being restricted at its receiving end whereby a i'ow of the lubricant is effected in proportion to the speed of the shaft.

3. A device of the class described comprising an oil-receptacle, a shaft, a tube projecting into avacuum-chamber communicating with the shaft and closed to the receptacle, said tube communicatin at its opposite end with the rece tacle an A having said outer end oontfctl, l

4. A. devised the dass described-imprising @bearing-box nrovled with an, Oil-recepmole, ashaft, a. tuheproietnsintq@vacuumchamber formed'in, boi;4 chamber beingv closed tOi-Said,- resntae e and; Open' t0 Sfdshaft, Seifltuha'havms awntrated'inlet being bent-to brin ,-saidinlet in close prossimo 'the .ammi-1f:animamos etesvtmaniy. Where@ iaixlmy Signature in nresencef tw@ witnesses.

J OHANN MU'HLRA-D.

Witnesses:

ALvlqsfro, S. Hocus, Ieoz` KUORSELMAQHEB. 

